Loader Valve Problem - Kubota B2620

[BAP]

Before you go tearing into your loader valve, have you checked to make sure you didn't bend or damage a piston. I would check there first. The odds of doing something to a piston when hitting something in the dump position are a lot great than damaging the control valve. Could be internal damage to one of the pistons that you can't see without taking it apart. One simple way of checking whether your valve is working right is to swap the loader lift hoses to the dump side of the valve and see if it lifts the loader up and down correctly. If it does, then you know it is not that valve and something in the loader itself. If it doesn't work then look into the valve further.

 

[GPintheMitten]

Before you go tearing into your loader valve, have you checked to make sure you didn't bend or damage a piston. I would check there first. The odds of doing something to a piston when hitting something in the dump position are a lot great than damaging the control valve. Could be internal damage to one of the pistons that you can't see without taking it apart. One simple way of checking whether your valve is working right is to swap the loader lift hoses to the dump side of the valve and see if it lifts the loader up and down correctly. If it does, then you know it is not that valve and something in the loader itself. If it doesn't work then look into the valve further.

Good idea. I could just swap the QD's right?

 

[BAP]

Yes, just swap the QD for the lift to the dump circuit and dump cylinders to the lift circuit.

 

[GPintheMitten]

Yes, just swap the QD for the lift to the dump circuit and dump cylinders to the lift circuit.

Ok thanks. I'll do that tomorrow and report back. A new loader control valve from Kubota is almost $500. No sense doing that if it's really a cylinder.

 

[GPintheMitten]

I'm finally ready to switch the QD's on the loader. switching lift for curl. Anybody know which QD's go to which function? (White, Blue, Red, Yellow)?

Is there a danger of breaking something if I connect the lines wrong?

I googled the color code for the LA364 loader and couldn't find anything. The manual is not straight forward on this.

Thanks.

 

[GPintheMitten]

I figured out the switching of the quick disconnects.

Results are that the bucket did curl up and down while the loader arms would not work correctly.

So does this mean I should replace the loader control valve?

 

[J_J]

The spools themselves, generally do not fail.

The parts on the spool can fail or come loose.

Small bits of rubber, metal or what ever can jam the spool making it inoperative.

You could try and tear the curl spool down and inspect and replace or tighten things and lube good.

If you can't do it, perhaps a hyd shop can inspect it for you.

 

[GPintheMitten]

The spools themselves, generally do not fail.

The parts on the spool can fail or come loose.

Small bits of rubber, metal or what ever can jam the spool making it inoperative.

You could try and tear the curl spool down and inspect and replace or tighten things and lube good.

If you can't do it, perhaps a hyd shop can inspect it for you.

Thanks JJ.

There is a hydraulic shop nearby. If I want them to tear onto it, should I remove it from the tractor or take the whole tractor to them?

 

[J_J]

Do as much work as you can as their labor could be anywhere from $45 to 60 per hour.

They should be able to tear it down , fix it and test it.

You could do this yourself if you had the manual on the loader.

 

[GPintheMitten]

I'll take the loader control valve off first and then decide whether to go further myself.

I have the loader manual user manual but no shop manual for the loader. I do have an exploded view of the valve itself that I got from the Kubota parts site.

Thanks. I'll post back later.